Playing with Pubmed and the following search equations to update my course, I found more than 150 published articles (2020/09/02): (“physical activity”[Title/Abstract]) AND (COVID[Title/Abstract]) and (“physical exercise”[Title/Abstract]) AND (COVID[Title/Abstract]).

I propose a rapid classification of references based on the methodological characteristics: interventional investigations, device measured physical activity during the COVID lockdown, and Mental health – Quality of life measures, physical activity and COVID

Interventional investigations – Physical exercise and COVID

• Ding, D., Cruz, B. del P., Green, M. A., & Bauman, A. E. (2020). Is the COVID-19 lockdown nudging people to be more active: a big data analysis. British Journal of Sports Medicine. https://doi.org/10.1136/bjsports-2020-102575
• Jeong, H.-C., Lee, E.-J., Youn, H.-S., & So, W.-Y. (2020). Development and Implementation of a “Music Beeps” Program to Promote Physical Fitness in Adolescents. International Journal of Environmental Research and Public Health, 17(17). https://doi.org/10.3390/ijerph17176148
• Quinn, L., Macpherson, C., Long, K., & Shah, H. (2020). Promoting Physical Activity via Telehealth in People With Parkinson Disease: The Path Forward After the COVID-19 Pandemic? Physical Therapy. https://doi.org/10.1093/ptj/pzaa128

Device measured physical activity during the COVID lockdown

• Di Sebastiano, K. M., Chulak-Bozzer, T., Vanderloo, L. M., & Faulkner, G. (2020). Don’t Walk So Close to Me: Physical Distancing and Adult Physical Activity in Canada. Frontiers in Psychology, 11, 1895. https://doi.org/10.3389/fpsyg.2020.01895
• Hemphill, N. M., Kuan, M. T. Y., & Harris, K. C. (2020). Reduced Physical Activity During COVID-19 Pandemic in Children With Congenital Heart Disease. The Canadian Journal of Cardiology, 36(7), 1130–1134. https://doi.org/10.1016/j.cjca.2020.04.038
• Huckins, J. F., daSilva, A. W., Wang, W., Hedlund, E., Rogers, C., Nepal, S. K., Wu, J., Obuchi, M., Murphy, E. I., Meyer, M. L., Wagner, D. D., Holtzheimer, P. E., & Campbell, A. T. (2020). Mental Health and Behavior of College Students During the Early Phases of the COVID-19 Pandemic: Longitudinal Smartphone and Ecological Momentary Assessment Study. Journal of Medical Internet Research, 22(6), e20185. https://doi.org/10.2196/20185
• Pépin, J. L., Bruno, R. M., Yang, R.-Y., Vercamer, V., Jouhaud, P., Escourrou, P., & Boutouyrie, P. (2020). Wearable Activity Trackers for Monitoring Adherence to Home Confinement During the COVID-19 Pandemic Worldwide: Data Aggregation and Analysis. Journal of Medical Internet Research, 22(6), e19787. https://doi.org/10.2196/19787
• Sassone, B., Mandini, S., Grazzi, G., Mazzoni, G., Myers, J., & Pasanisi, G. (2020). Impact of COVID-19 Pandemic on Physical Activity in Patients With Implantable Cardioverter-Defibrillators. Journal of Cardiopulmonary Rehabilitation and Prevention, 40(5), 285–286. https://doi.org/10.1097/HCR.0000000000000539
• Tison, G. H., Avram, R., Kuhar, P., Abreau, S., Marcus, G. M., Pletcher, M. J., & Olgin, J. E. (2020). Worldwide Effect of COVID-19 on Physical Activity: A Descriptive Study. Annals of Internal Medicine. https://doi.org/10.7326/M20-2665
• Vetrovsky, T., Frybova, T., Gant, I., Semerad, M., Cimler, R., Bunc, V., Siranec, M., Miklikova, M., Vesely, J., Griva, M., Precek, J., Pelouch, R., Parenica, J., & Belohlavek, J. (2020). The detrimental effect of COVID-19 nationwide quarantine on accelerometer-assessed physical activity of heart failure patients. ESC Heart Failure. https://doi.org/10.1002/ehf2.12916

Mental health – Quality of life measures, physical activity and COVID

• Callow, D. D., Arnold-Nedimala, N. A., Jordan, L. S., Pena, G. S., Won, J., Woodard, J. L., & Smith, J. C. (2020). The Mental Health Benefits of Physical Activity in Older Adults Survive the COVID-19 Pandemic. The American Journal of Geriatric Psychiatry: Official Journal of the American Association for Geriatric Psychiatry. https://doi.org/10.1016/j.jagp.2020.06.024
• Diamond, R., & Waite, F. (2020). Physical activity in a pandemic: A new treatment target for psychological therapy. Psychology and Psychotherapy. https://doi.org/10.1111/papt.12294
• Duncan, G. E., Avery, A. R., Seto, E., & Tsang, S. (2020). Perceived change in physical activity levels and mental health during COVID-19: Findings among adult twin pairs. PloS One, 15(8), e0237695. https://doi.org/10.1371/journal.pone.0237695
• Jacob, L., Tully, M. A., Barnett, Y., Lopez-Sanchez, G. F., Butler, L., Schuch, F., López-Bueno, R., McDermott, D., Firth, J., Grabovac, I., Yakkundi, A., Armstrong, N., Young, T., & Smith, L. (2020). The relationship between physical activity and mental health in a sample of the UK public: A cross-sectional study during the implementation of COVID-19 social distancing measures. Mental Health and Physical Activity, 19, 100345. https://doi.org/10.1016/j.mhpa.2020.100345
• Khan, A. H., Sultana, M. S., Hossain, S., Hasan, M. T., Ahmed, H. U., & Sikder, M. T. (2020). The impact of COVID-19 pandemic on mental health & wellbeing among home-quarantined Bangladeshi students: A cross-sectional pilot study. Journal of Affective Disorders, 277, 121–128. https://doi.org/10.1016/j.jad.2020.07.135
• Lesser, I. A., & Nienhuis, C. P. (2020). The Impact of COVID-19 on Physical Activity Behavior and Well-Being of Canadians. International Journal of Environmental Research and Public Health, 17(11). https://doi.org/10.3390/ijerph17113899
• López-Bueno, R., Calatayud, J., Ezzatvar, Y., Casajús, J. A., Smith, L., Andersen, L. L., & López-Sánchez, G. F. (2020). Association Between Current Physical Activity and Current Perceived Anxiety and Mood in the Initial Phase of COVID-19 Confinement. Frontiers in Psychiatry, 11, 729. https://doi.org/10.3389/fpsyt.2020.00729
• Pieh, C., Budimir, S., & Probst, T. (2020). The effect of age, gender, income, work, and physical activity on mental health during coronavirus disease (COVID-19) lockdown in Austria. Journal of Psychosomatic Research, 136, 110186. https://doi.org/10.1016/j.jpsychores.2020.110186
• Schuch, F. B., Bulzing, R. A., Meyer, J., Vancampfort, D., Firth, J., Stubbs, B., Grabovac, I., Willeit, P., Tavares, V. D. O., Calegaro, V. C., Deenik, J., López-Sánchez, G. F., Veronese, N., Caperchione, C. M., Sadarangani, K. P., Abufaraj, M., Tully, M. A., & Smith, L. (2020). Associations of moderate to vigorous physical activity and sedentary behavior with depressive and anxiety symptoms in self-isolating people during the COVID-19 pandemic: A cross-sectional survey in Brazil. Psychiatry Research, 292, 113339. https://doi.org/10.1016/j.psychres.2020.113339
• Slimani, M., Paravlic, A., Mbarek, F., Bragazzi, N. L., & Tod, D. (2020). The Relationship Between Physical Activity and Quality of Life During the Confinement Induced by COVID-19 Outbreak: A Pilot Study in Tunisia. Frontiers in Psychology, 11, 1882. https://doi.org/10.3389/fpsyg.2020.01882
• Wang, X., Lei, S. M., Le, S., Yang, Y., Zhang, B., Yao, W., Gao, Z., & Cheng, S. (2020). Bidirectional Influence of the COVID-19 Pandemic Lockdowns on Health Behaviors and Quality of Life among Chinese Adults. International Journal of Environmental Research and Public Health, 17(15). https://doi.org/10.3390/ijerph17155575
• Zhou, J., Yuan, X., Qi, H., Liu, R., Li, Y., Huang, H., Chen, X., & Wang, G. (2020). Prevalence of depression and its correlative factors among female adolescents in China during the coronavirus disease 2019 outbreak. Globalization and Health, 16(1), 69. https://doi.org/10.1186/s12992-020-00601-3